/* ==========================================================================
   B长地铁 官网 · 暗黑主题
   照片主导 + 大留白 + 大标题 + 磨砂导航 + 圆角卡片 + 克制动效
   ========================================================================== */

:root{
  --bg:#000000;
  --bg-alt:#0c0c0e;
  --surface:#161618;
  --surface-2:#1d1d20;
  --ink:#f5f5f7;
  --ink-2:#a1a1a6;
  --ink-3:#6e6e73;
  --line:rgba(255,255,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --red:#F4483A;
  --red-deep:#d8382c;
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --shadow-1:0 2px 14px rgba(0,0,0,.5);
  --shadow-2:0 18px 50px rgba(0,0,0,.6);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:48px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue",
         "PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;

  /* 线网图主题色（map.js 读取） */
  --map-label:#f5f5f7;
  --map-label-sub:#9a9aa0;
  --map-station-fill:#0b0b0d;
  --map-station-stroke:#f5f5f7;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
section[id]{scroll-margin-top:60px}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:17px;line-height:1.47;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-synthesis:none;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.018em;line-height:1.1}
p{margin:0}
ul,ol,dl{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid rgba(244,72,58,.6);outline-offset:3px;border-radius:6px}

.wrap{width:min(1120px,calc(100% - 48px));margin-inline:auto}
.wrap--wide{width:min(1360px,calc(100% - 48px))}

/* ------------------------------------------------------------------ 导航 */
.nav{
  position:fixed;inset:0 0 auto;z-index:100;height:var(--nav-h);
  background:rgba(10,10,12,.72);
  -webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.nav.is-scrolled{border-bottom-color:var(--line-soft);background:rgba(8,8,10,.86)}
.nav-inner{
  width:min(1360px,calc(100% - 32px));margin-inline:auto;height:100%;
  display:flex;align-items:center;gap:28px;
}
.brand{display:flex;align-items:center;gap:9px;font-size:15px}
.brand-mark{display:grid;place-items:center}
.brand-name{font-weight:600;color:#fff}
.brand-sub{color:var(--ink-3);font-size:11px;letter-spacing:.08em;padding-left:9px;border-left:1px solid var(--line)}
.nav-links{display:flex;gap:26px;margin-left:auto}
.nav-links a{color:rgba(245,245,247,.82);font-size:12.5px;transition:color .2s var(--ease)}
.nav-links a:hover,.nav-links a.is-active{color:#fff}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-toggle{display:none;width:34px;height:34px;border:0;background:none;position:relative;cursor:pointer}
.nav-toggle span{position:absolute;left:7px;width:20px;height:1.6px;background:var(--ink);transition:transform .3s var(--ease)}
.nav-toggle span:first-child{top:13px}
.nav-toggle span:last-child{top:20px}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ------------------------------------------------------------------ 按钮 */
.btn-pill{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--ink);color:#000;border:0;border-radius:980px;
  padding:12px 26px;font-size:16px;font-weight:500;line-height:1.2;cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-pill:hover{background:#fff;transform:translateY(-1px);box-shadow:0 10px 30px rgba(255,255,255,.14)}
.btn-pill:active{transform:translateY(0) scale(.99)}
.btn-pill--sm{padding:7px 16px;font-size:12.5px}
.btn-pill--ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn-pill--ghost:hover{background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.3)}
.btn-pill--red{background:var(--red);color:#fff}
.btn-pill--red:hover{background:#ff5a4c;box-shadow:0 10px 30px rgba(244,72,58,.3)}
.link-chevron{
  display:inline-flex;align-items:center;gap:5px;color:#fff;font-size:16px;
  transition:gap .22s var(--ease),opacity .22s;
}
.link-chevron:hover{gap:9px;opacity:.75}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--red);margin-bottom:16px}

/* ------------------------------------------------------------------ Hero */
.hero{position:relative;padding:calc(var(--nav-h) + 110px) 0 0;overflow:hidden}
.hero-bg{position:absolute;inset:0 0 auto;height:100%;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:50% 45%;opacity:.55;will-change:transform}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 80% at 50% 0%,rgba(0,0,0,.2) 0%,rgba(0,0,0,.72) 55%,#000 100%),
    linear-gradient(180deg,rgba(0,0,0,.6) 0%,rgba(0,0,0,.25) 30%,#000 92%);
}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-title{
  font-size:clamp(36px,6vw,76px);font-weight:600;letter-spacing:-.03em;line-height:1.06;
  text-shadow:0 2px 40px rgba(0,0,0,.5);
}
.hero-sub{margin:24px auto 0;max-width:680px;font-size:clamp(16px,1.45vw,20px);line-height:1.55;color:#d6d6da}
.hero-cta{display:flex;align-items:center;justify-content:center;gap:30px;margin-top:32px;flex-wrap:wrap}
.hero-stats{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;
  width:min(1120px,calc(100% - 48px));margin:104px auto 0;
  padding:30px 0 36px;border-top:1px solid var(--line-soft);
}
.hero-stats li{text-align:center;padding:0 12px}
.stat-num{display:block;font-size:clamp(24px,3vw,38px);font-weight:600;letter-spacing:-.025em;font-variant-numeric:tabular-nums}
.stat-label{display:block;margin-top:6px;font-size:12.5px;color:var(--ink-2)}


/* 首屏浮动参数标签 */
.hero-chips{position:absolute;inset:0;z-index:1;pointer-events:none;transition-delay:.5s}
.chip{
  position:absolute;display:inline-flex;align-items:center;gap:8px;
  padding:9px 15px;border-radius:980px;font-size:12.5px;color:var(--ink);white-space:nowrap;
  background:rgba(18,18,22,.62);border:1px solid var(--line);
  -webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);
  box-shadow:0 10px 34px rgba(0,0,0,.55);
  animation:float 7.5s ease-in-out infinite;
}
.chip i{width:7px;height:7px;border-radius:50%;background:var(--red);flex:none;
  box-shadow:0 0 0 4px rgba(244,72,58,.2)}
.chip--a{left:5%;top:21%}
.chip--b{right:5%;top:19%;animation-delay:-2.5s}
.chip--c{right:7%;top:41%;animation-delay:-5s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* ------------------------------------------------------------------ 通栏大图板块 */
.band{position:relative;overflow:hidden;padding:150px 0;margin:0}
.band--tall{padding:170px 0}
.band-bg{position:absolute;inset:0;z-index:0}
.band-bg img{width:100%;height:100%;object-fit:cover;opacity:.5;will-change:transform}
.band-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,#000 0%,rgba(0,0,0,.42) 26%,rgba(0,0,0,.5) 62%,#000 100%),
    radial-gradient(90% 70% at 25% 50%,rgba(0,0,0,.6) 0%,rgba(0,0,0,0) 70%);
}
.band-inner{position:relative;z-index:1;max-width:760px}
.band-title{font-size:clamp(30px,4.4vw,58px);letter-spacing:-.03em;line-height:1.1}
.band-text{margin-top:24px;font-size:clamp(16px,1.4vw,19px);line-height:1.65;color:#c9c9ce}
.safety-stats{display:flex;flex-wrap:wrap;gap:56px;margin-top:48px;padding-top:32px;border-top:1px solid var(--line-soft)}
.safety-stats .stat-num{font-size:clamp(24px,3vw,34px)}

/* ------------------------------------------------------------------ 通用 section */
.section{padding:130px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:96px 0}
.section-head{max-width:760px;margin:0 auto 58px;text-align:center}
.section-head h2{font-size:clamp(28px,4.2vw,52px);letter-spacing:-.028em}
.section-sub{margin-top:18px;font-size:clamp(16px,1.35vw,19px);color:var(--ink-2);line-height:1.55}

/* ------------------------------------------------------------------ Bento */
.bento{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tile{
  background:var(--surface);border-radius:var(--r-lg);padding:38px 38px 0;
  display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease),background .5s var(--ease);
}
.tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);background:var(--surface-2)}
.tile-tag{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--red);margin-bottom:14px}
.tile h3{font-size:clamp(20px,2vw,26px);letter-spacing:-.02em}
.tile p{margin-top:14px;color:var(--ink-2);font-size:15.5px;line-height:1.6}
.tile-art{margin:28px -38px 0;padding:0 38px 34px;color:var(--ink);flex:1;display:flex;align-items:flex-end}
.tile-art svg{width:100%;height:auto}
.tile-art--sm{max-width:210px;margin-inline:auto;padding-bottom:34px}

.tile--photo{padding:0;position:relative;min-height:400px}
.tile--photo img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.62;transition:transform 1.1s var(--ease),opacity .5s}
.tile--photo:hover img{transform:scale(1.03);opacity:.7}
.tile--photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.15) 0%,rgba(0,0,0,.55) 52%,rgba(0,0,0,.92) 100%);
}
.tile--photo .tile-body{position:relative;z-index:1;margin-top:auto;padding:34px 38px 36px}
.tile--photo h3{font-size:clamp(22px,2.2vw,29px)}
.tile--photo p{color:#cbcbd0}

.feature-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px;
  margin-top:44px;padding-top:40px;border-top:1px solid var(--line-soft);
}
.feature-row b{display:block;font-size:20px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.feature-row span{display:block;margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.5}

/* ------------------------------------------------------------------ 在建线路 */
.future-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.future-media{margin:0;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-2)}
.future-media img{width:100%;height:100%;object-fit:cover;opacity:.85}
.future-item{padding:26px 0;border-bottom:1px solid var(--line-soft)}
.future-item:last-child{border-bottom:0}
.future-item header{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.future-item h3{font-size:clamp(20px,2vw,26px)}
.future-item p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.6}
.progress-list{margin-top:20px;display:grid;gap:12px}
.progress-list div{display:grid;grid-template-columns:88px 1fr;align-items:center;gap:16px;font-size:13.5px}
.progress-list dt{color:var(--ink-3)}
.progress-list dd{margin:0;display:flex;align-items:center;gap:12px;font-variant-numeric:tabular-nums}
.bar{flex:1;height:6px;border-radius:980px;background:rgba(255,255,255,.12);overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:980px;background:linear-gradient(90deg,#5a5a60,#f5f5f7);transition:width 1.1s var(--ease)}
[data-reveal].is-in .bar i{width:var(--w)}

/* ------------------------------------------------------------------ 线网图 */
.map-shell{
  background:#0e0e10;border-radius:var(--r-lg);box-shadow:var(--shadow-2);
  display:grid;grid-template-columns:1fr 268px;overflow:hidden;border:1px solid var(--line-soft);
}
.map-legend{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:8px;padding:20px 24px;border-bottom:1px solid var(--line-soft)}
.legend-chip{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);
  background:transparent;color:var(--ink);border-radius:980px;padding:6px 14px;font-size:12.5px;cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.legend-chip:hover{border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.05);transform:translateY(-1px)}
.legend-chip i{width:10px;height:10px;border-radius:3px;flex:none}
.legend-chip.is-off{opacity:.35}
.map-canvas{position:relative;padding:16px 8px;background:radial-gradient(130% 120% at 25% 0%,#15151a 0%,#0b0b0d 70%)}
#metroMap{width:100%;height:auto;cursor:grab;touch-action:pan-y}
#metroMap.is-dragging{cursor:grabbing}
.map-tools{position:absolute;right:16px;bottom:44px;display:grid;gap:6px}
.map-tools button{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--line);
  background:rgba(30,30,34,.8);color:var(--ink-2);font-size:15px;line-height:1;cursor:pointer;
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  transition:color .2s,transform .2s,border-color .2s,background .2s;
}
.map-tools button:hover{color:#fff;border-color:rgba(255,255,255,.4);background:rgba(50,50,56,.9);transform:scale(1.06)}
.map-hint{position:absolute;left:20px;bottom:12px;margin:0;font-size:11.5px;color:var(--ink-3)}
.map-panel{border-left:1px solid var(--line-soft);padding:28px 24px;background:#131316}
.mp-hint{font-size:13.5px;color:var(--ink-3);line-height:1.7;text-align:center;margin-top:40px}
.mp-station{font-size:26px;letter-spacing:-.025em}
.mp-lines{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.mp-lines span{font-size:11.5px;color:#fff;border-radius:980px;padding:3px 10px;font-weight:500}
.mp-badge{display:inline-block;margin-top:12px;font-size:11.5px;font-weight:600;color:var(--red);background:rgba(244,72,58,.14);padding:4px 10px;border-radius:980px}
.mp-list{margin-top:22px;border-top:1px solid var(--line-soft);padding-top:6px}
.mp-list div{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:13.5px}
.mp-list dt{color:var(--ink-2)}
.mp-list dd{margin:0;font-weight:500;font-variant-numeric:tabular-nums;text-align:right}
.mp-form-title{margin-top:16px;font-size:12px;color:var(--ink-3)}
.mp-form{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.mp-form span{font-size:11.5px;color:var(--ink-2);background:rgba(255,255,255,.07);border-radius:980px;padding:4px 10px}
.mp-bar{height:6px;border-radius:980px;background:rgba(255,255,255,.1);margin-top:14px;overflow:hidden}
.mp-bar i{display:block;height:100%;border-radius:980px}
.chart-note{margin-top:8px;font-size:12.5px;color:var(--ink-3)}

.table-wrap{overflow-x:auto;margin-top:52px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:760px}
th,td{text-align:left;padding:15px 16px;border-bottom:1px solid var(--line-soft);vertical-align:middle}
thead th{font-size:11.5px;font-weight:600;color:var(--ink-3);letter-spacing:.04em;border-bottom-color:rgba(255,255,255,.28);white-space:nowrap}
tbody th{font-weight:600;color:var(--ink)}
tbody tr{transition:background .2s var(--ease)}
tbody tr:hover{background:rgba(255,255,255,.035)}
.line-dot{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:9px;vertical-align:-1px}
.price{font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.pill{display:inline-block;font-size:11.5px;font-weight:600;padding:4px 11px;border-radius:980px;white-space:nowrap}
.pill--ok{color:#5ce08f;background:rgba(92,224,143,.14)}
.pill--hot{color:#ff7a6c;background:rgba(244,72,58,.16)}
.pill--limit{color:#e8c65c;background:rgba(232,198,92,.14)}

/* ------------------------------------------------------------------ 票价 */
.fare-grid{display:grid;grid-template-columns:1.32fr .68fr;gap:52px;align-items:start}
.fare-grid .table-wrap{margin-top:0}
.fare-side{background:var(--surface);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1)}
.fare-side figure{margin:0}
.fare-side figure img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;opacity:.7;transition:transform 1.1s var(--ease)}
.fare-side:hover figure img{transform:scale(1.04)}
.fare-side h3{padding:28px 30px 0;font-size:21px}
.pay-list{padding:16px 30px 0}
.pay-list li{display:grid;gap:4px;padding:14px 0;border-bottom:1px solid var(--line-soft)}
.pay-list b{font-size:15px;font-weight:600}
.pay-list span{font-size:13.5px;color:var(--ink-2)}
.fare-note{padding:18px 30px 30px;font-size:12.5px;color:var(--ink-3);line-height:1.6}

/* ------------------------------------------------------------------ App */
.app-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.app-copy h2{font-size:clamp(28px,3.6vw,46px);letter-spacing:-.03em;line-height:1.12}
.app-text{margin-top:22px;font-size:17px;line-height:1.62;color:var(--ink-2)}
.app-list{margin-top:30px;display:grid;gap:2px}
.app-list li{padding:16px 0;border-bottom:1px solid var(--line-soft)}
.app-list b{display:block;font-size:16px;font-weight:600}
.app-list span{display:block;margin-top:5px;font-size:14px;color:var(--ink-2)}
.app-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.app-meta{margin-top:18px;font-size:13px;color:var(--ink-3)}

.phone-wrap{display:grid;place-items:center}
.phone{
  width:300px;padding:12px;border-radius:46px;
  background:linear-gradient(160deg,#2a2a2e,#0e0e10);
  box-shadow:0 40px 90px rgba(0,0,0,.75),inset 0 0 0 1px rgba(255,255,255,.14);
}
.phone-screen{border-radius:36px;background:#050507;padding:14px 16px 10px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.ph-status{display:flex;justify-content:space-between;font-size:10.5px;color:var(--ink-2);padding:2px 4px 12px}
.ph-station{font-size:21px;font-weight:600;letter-spacing:-.02em}
.ph-station em{font-style:normal;font-size:11px;color:var(--red);font-weight:600;margin-left:6px}
.ph-next{margin-top:14px;padding:16px;border-radius:16px;background:linear-gradient(150deg,#1c1c21,#101014)}
.ph-label{font-size:11.5px;color:var(--ink-2)}
.ph-eta{margin-top:6px;font-size:26px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.ph-eta b{font-size:34px;font-weight:600}
.ph-cars{display:flex;gap:5px;margin-top:14px}
.ph-cars i{flex:1;height:22px;border-radius:5px;background:rgba(255,255,255,.14)}
.ph-cars i.mid{background:var(--red)}
.ph-hint{margin-top:10px;font-size:11px;color:var(--red)}
.ph-rows{margin-top:14px}
.ph-rows li{display:flex;justify-content:space-between;padding:11px 2px;border-bottom:1px solid var(--line-soft);font-size:13px}
.ph-rows li span{color:var(--ink-2)}
.ph-rows li b{font-weight:600;font-variant-numeric:tabular-nums}
.ph-tab{display:flex;justify-content:space-between;padding:16px 6px 8px;font-size:11px;color:var(--ink-3)}
.ph-tab .on{color:#fff;font-weight:600}


/* ------------------------------------------------------------------ 技术版块 */
.section--tech{background:#0a0a0c;border-top:1px solid var(--line-soft)}
.tech-drawings{display:grid;grid-template-columns:1.06fr .94fr;gap:20px;margin-bottom:20px}
.tech-drawings .drawing--wide{grid-column:1 / -1}
.drawing{
  margin:0;background:var(--surface);border-radius:var(--r-lg);padding:22px 22px 0;
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.drawing:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.drawing img{width:100%;height:auto;border-radius:8px;background:#0b0b0d;transition:transform .9s var(--ease)}
.drawing:hover img{transform:scale(1.02)}
.drawing figcaption{padding:16px 4px 20px;font-size:12.5px;color:var(--ink-3)}
.tech-facts{background:var(--surface);border-radius:var(--r-lg);padding:32px 34px;box-shadow:var(--shadow-1)}
.tech-facts h3{font-size:20px}
.fact-list{margin-top:18px}
.fact-list div{display:flex;justify-content:space-between;gap:18px;padding:12px 0;border-bottom:1px solid var(--line-soft);font-size:13.5px}
.fact-list div:last-child{border-bottom:0}
.fact-list dt{color:var(--ink-2);flex:none}
.fact-list dd{margin:0;text-align:right;font-variant-numeric:tabular-nums}
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:20px}
.spec-card{
  background:var(--surface);border-radius:var(--r-lg);padding:30px 30px 22px;box-shadow:var(--shadow-1);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease),background .5s var(--ease);
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);background:var(--surface-2)}
.spec-card h3{font-size:17px;letter-spacing:-.01em;color:var(--ink)}
.spec-card dl{margin-top:16px}
.spec-card dl div{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--line-soft);font-size:13px}
.spec-card dl div:last-child{border-bottom:0}
.spec-card dt{color:var(--ink-3);flex:none}
.spec-card dd{margin:0;text-align:right;font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:-.005em}
.tech-split{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}
.tech-card{background:var(--surface);border-radius:var(--r-lg);padding:32px 34px;box-shadow:var(--shadow-1)}
.tech-card h3{font-size:20px}
.bar-list{margin-top:20px;display:grid;gap:16px}
.bar-list li{display:grid;grid-template-columns:1fr auto;gap:6px 14px;align-items:center;font-size:13.5px}
.bar-list span{color:var(--ink-2)}
.bar-list b{font-weight:500;font-variant-numeric:tabular-nums;color:var(--ink)}
.bar-list i{grid-column:1 / -1;display:block;height:6px;border-radius:980px;background:rgba(255,255,255,.1);position:relative;overflow:hidden}
.bar-list i::after{content:"";position:absolute;inset:0 auto 0 0;width:0;border-radius:980px;
  background:linear-gradient(90deg,#6a6a72,#f5f5f7);transition:width 1.1s var(--ease)}
.bar-list.is-in i::after,[data-reveal].is-in .bar-list i::after{width:var(--w)}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px;padding-top:24px;border-top:1px solid var(--line-soft)}
.mini-stats b{display:block;font-size:19px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.mini-stats span{display:block;margin-top:6px;font-size:12.5px;color:var(--ink-3);line-height:1.45}
.ops-list{margin-top:20px}
.ops-list li{padding:15px 0;border-bottom:1px solid var(--line-soft)}
.ops-list li:last-child{border-bottom:0}
.ops-list b{display:block;font-size:14.5px;font-weight:600}
.ops-list span{display:block;margin-top:5px;font-size:13px;color:var(--ink-2);line-height:1.5}

/* ------------------------------------------------------------------ 数据 */
.metric-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  padding-bottom:52px;margin-bottom:52px;border-bottom:1px solid var(--line-soft);
}
.metric-row li{text-align:center}
.metric-num{display:block;font-size:clamp(28px,3.6vw,44px);font-weight:600;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.metric-label{display:block;margin-top:8px;font-size:13px;color:var(--ink-2)}
.data-split{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.chart-card h3{font-size:23px;letter-spacing:-.02em}
.chart{margin-top:28px;display:grid;gap:14px}
.chart li{display:grid;grid-template-columns:104px 1fr 74px;align-items:center;gap:16px;font-size:13.5px}
.chart .c-name{color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chart .c-bar{height:9px;border-radius:980px;background:rgba(255,255,255,.1);overflow:hidden}
.chart .c-bar i{display:block;height:100%;width:0;border-radius:980px;background:linear-gradient(90deg,#6a6a72,#f5f5f7);transition:width 1.2s var(--ease)}
.chart .c-val{text-align:right;font-weight:500;font-variant-numeric:tabular-nums}
.data-photo{margin:0;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-2)}
.data-photo img{width:100%;height:auto;aspect-ratio:4/3.4;object-fit:cover;opacity:.85;transition:transform 1.1s var(--ease)}
.data-photo:hover img{transform:scale(1.03)}
.data-photo figcaption{padding:16px 22px;font-size:12.5px;color:var(--ink-2);background:#101013}

/* ------------------------------------------------------------------ 文创 */
.culture-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.culture-card{background:var(--surface);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.culture-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.culture-card img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;opacity:.8;transition:transform 1.1s var(--ease)}
.culture-card:hover img{transform:scale(1.04)}
.culture-body{padding:26px 28px 30px}
.culture-body h3{font-size:20px}
.culture-body p{margin-top:12px;font-size:14.5px;line-height:1.6;color:var(--ink-2)}
.culture-price{margin-top:18px;font-size:16px;font-weight:600;color:var(--ink)}

/* ------------------------------------------------------------------ 公告 */
.news-list li{display:grid;grid-template-columns:104px 1fr auto;gap:22px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line-soft)}
.news-list li:first-child{border-top:1px solid var(--line-soft)}
.news-list time{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.news-list a{font-size:17px;transition:color .2s var(--ease)}
.news-list a:hover{color:var(--red)}

/* ------------------------------------------------------------------ 联系 */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:start}
.contact-form{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:grid;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:13px;font-weight:500;color:var(--ink-2)}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-sm);
  background:rgba(255,255,255,.04);color:var(--ink);padding:13px 15px;font-size:15.5px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s;
}
.field textarea{resize:vertical;min-height:104px}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--red);background:rgba(255,255,255,.07);box-shadow:0 0 0 4px rgba(244,72,58,.16);
}
.field input::placeholder,.field textarea::placeholder{color:#6e6e73}
.field select option{background:#1a1a1e;color:var(--ink)}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:6px}
.form-note{font-size:12.5px;color:var(--ink-3)}
.form-ok{grid-column:1 / -1;margin-top:8px;padding:14px 18px;border-radius:var(--r-sm);background:rgba(92,224,143,.12);color:#5ce08f;font-size:14.5px}
.contact-info{display:grid;gap:2px;background:var(--surface);border-radius:var(--r-lg);padding:34px;box-shadow:var(--shadow-1)}
.ci-block{padding:18px 0;border-bottom:1px solid var(--line-soft)}
.ci-block:last-child{border-bottom:0}
.ci-block h3{font-size:12.5px;font-weight:600;color:var(--ink-3);letter-spacing:.04em}
.ci-strong{margin-top:8px;font-size:18px;font-weight:600;letter-spacing:-.015em}
.ci-sub{margin-top:4px;font-size:13.5px;color:var(--ink-2)}

/* ------------------------------------------------------------------ 页脚 */
.footer{background:var(--bg-alt);padding:66px 0 40px;font-size:13px;color:var(--ink-2);border-top:1px solid var(--line-soft)}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding-bottom:42px;border-bottom:1px solid var(--line-soft)}
.footer-col h4{font-size:13px;font-weight:600;color:var(--ink);margin-bottom:16px}
.footer-col li{margin-bottom:10px;line-height:1.5}
.footer-col a{color:var(--ink-2);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--ink)}
.footer-legal{padding-top:26px;display:grid;gap:8px;font-size:12px;color:var(--ink-3);line-height:1.6}

/* ------------------------------------------------------------------ 动效 */
.fx [data-reveal]{opacity:0;transform:translateY(26px)}
[data-reveal]{transition:opacity .85s var(--ease),transform .85s var(--ease)}
.fx [data-reveal].is-in{opacity:1;transform:none}
.reveal-fallback [data-reveal]{opacity:1!important;transform:none!important;transition:none!important}
.bento [data-reveal]:nth-child(2){transition-delay:.08s}
.bento [data-reveal]:nth-child(3){transition-delay:.16s}
.bento [data-reveal]:nth-child(4){transition-delay:.24s}
.spec-grid [data-reveal]:nth-child(3n+2){transition-delay:.08s}
.spec-grid [data-reveal]:nth-child(3n){transition-delay:.16s}
.culture-grid [data-reveal]:nth-child(2){transition-delay:.1s}
.culture-grid [data-reveal]:nth-child(3){transition-delay:.2s}
.tech-drawings [data-reveal]:nth-child(3){transition-delay:.12s}
.tech-split [data-reveal]:nth-child(2){transition-delay:.12s}
.contact-grid [data-reveal]:nth-child(2){transition-delay:.1s}
@media (prefers-reduced-motion:reduce){
  .fx [data-reveal]{opacity:1;transform:none;transition:none}
  .chip{animation:none}
  html{scroll-behavior:auto}
}

/* ------------------------------------------------------------------ 响应式 */
@media (max-width:1200px){
  .hero-chips{display:none}
}
@media (max-width:1080px){
  .section{padding:100px 0}
  .band,.band--tall{padding:110px 0}
  .future-grid,.app-grid,.fare-grid,.contact-grid,.data-split{grid-template-columns:1fr;gap:40px}
  .future-media img{aspect-ratio:16/9}
  .map-shell{grid-template-columns:1fr}
  .map-panel{border-left:0;border-top:1px solid var(--line-soft)}
  .culture-grid{grid-template-columns:1fr 1fr}
  .feature-row{grid-template-columns:1fr 1fr;gap:24px}
  .tech-drawings,.spec-grid,.tech-split{grid-template-columns:1fr}
}
@media (max-width:860px){
  .nav-links{
    position:fixed;inset:var(--nav-h) 0 auto;flex-direction:column;gap:0;
    background:#0d0d0f;padding:8px 24px 20px;border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(0,0,0,.6);
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .28s var(--ease),transform .28s var(--ease);
  }
  .nav-links.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{padding:14px 0;font-size:16px;border-bottom:1px solid var(--line-soft)}
  .brand-sub{display:none}
  .nav-toggle{display:block}
  .hero{padding-top:calc(var(--nav-h) + 72px)}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:26px 8px;margin-top:72px}
  .bento{grid-template-columns:1fr}
  .tile--photo{min-height:340px}
  .metric-row{grid-template-columns:repeat(2,1fr);gap:30px 8px}
  .culture-grid{grid-template-columns:1fr}
  .contact-form{grid-template-columns:1fr}
  .news-list li{grid-template-columns:1fr auto;gap:8px 16px}
  .news-list time{grid-column:1 / -1}
  .footer-cols{grid-template-columns:1fr 1fr;gap:26px}
  .safety-stats{gap:32px}
  .section{padding:82px 0}
  .phone{width:270px}
  .spec-grid{grid-template-columns:1fr}
  .mini-stats{grid-template-columns:1fr}
}
@media (max-width:560px){
  .wrap,.wrap--wide,.hero-stats{width:calc(100% - 32px)}
  .feature-row{grid-template-columns:1fr}
  .hero-cta{gap:18px}
  .tile{padding:28px 24px 0}
  .tile-art{margin-inline:-24px;padding-inline:24px}
  .tile--photo{padding:0}
  .tile--photo .tile-body{padding:26px 24px 28px}
}